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Test your basic knowledge |
Dairy Cattle And Reproduction
Start Test
Study First
Subjects
:
industries
,
dairy
Instructions:
Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can
study here
.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.
This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. What about the sperm for a bull which has been castrated but still has testicles?
semen evaluation (BSE)
Testicles will produce testosterone but not sperm. Bull will attempt to mate - but will be sterile
sow estrus cycle
sertoli cells
2. Look for infection - split - and rupture of the penis
why does the cow need fat deposits during pregnancy?
penis and prepuce observation (BSE)
semen evaluation (BSE)
ewe estrus
3. Gonadotropic (GnRH) is (FSH and LH). Follical Stimulating (FSH) and Lutinizing Hormone (LH).
Sperm growth rate
Dairy Cattle Gestation
effects of estrogen
hormones
4. ~305 days (altough often longer due to breeding difficulties)
Dairy Cattle Lactation (standard)
dartos muscle
leydid or interstitial cells
scrotum
5. Allows extension of penis without fibro-elastic penis
Dairy calves are removed from cow at birth to...
leydid or interstitial cells
monorchid
sigmoid flexure
6. 1. brain function - 2. blood flow - 3. willing female
what has to happen for males for copulation to occur
Holstein Cow
growth lost from castration methods (knife & band)
eminal vesicles
7. Superior genes are _______ to multiply
~1 month
Reasons for gestation length being affected
Hard
urethra
8. Scar tissue plugs up chambers of udder
mastitis
ewe gestation
Blood
Hard
9. Milk made by mother which includes antibodies for the calf. MUST be given to the calf within the first 24 hrs of life. also provides calf with energy stores. effectiveness lasts from 4-8 months of age.
scrotal circumference (BSE)
colostrum
sow ovulation
Blood
10. Important 'landmark' during palpation
libido test (BSE)
Hard
epididymis: definition - 3 parts - 4 functions
cervix
11. Knife-loose ~1wk of growth. band-loose ~2wks of growth.
dry-off time in dairy cattle
Dairy Cattle milking schedule
cervix
growth lost from castration methods (knife & band)
12. Hold the penis in the bulls body when not in use. releases penis before ejaculation or urination.
oviducts
retractor muscles
cow estrus
elastrator
13. Castration tool which clamps down on the vans deferens. causes the sperm to not reach the penis to be ejaculated
burdizzo
Sperm survival specs
prostate gland
dry matter and water
14. 4-6 days
mare estrus
epididymis: definition - 3 parts - 4 functions
~1 month
reason for seasonal breeding periods
15. 1. bring in new genes - 2. replace males with leg problems (difficulty breeding) Note: culling has a much greater emphasis in the dairy industry vs the beef industry.
epididymis: definition - 3 parts - 4 functions
Culls bulls earlier (2 reasons)
cryptorchid
Dairy calves are removed from cow at birth to...
16. The more stressed out the male is - the less sperm he is going to produce
why does the cow need fat deposits during pregnancy?
humans: stress level vs sperm
cryptorchid
libido test (BSE)
17. (LH) causes female's egg to break (her period)
ewe's estrous cycle
Lutinizing Hormone in females
libido test (BSE)
Follical Stimulating in males
18. Can survive ~7 days in cow. vast majority <48 hours
leydid or interstitial cells
Sperm survival specs
Culls bulls earlier (2 reasons)
oviducts
19. Milk ~305 days - dry 60 days prior to calving
organs used in spermatogenesis
Dairy Cattle milking schedule
sow estrus cycle
estrus
20. Contains and regulates the temp of the testes for sperm production
scrotum
estrus
castration
cow estrus cycle
21. 1-3 days
cow estrus cycle
monorchid
ewe's estrous cycle
sow estrus
22. Why Dairy calves are fed powdered milk.
1. more cost effective - 2. powdered milk is in excess production
castration
feeding a high producing dairy cow
Blood
23. Pulls sperm and egg together - gets body ready for pregnany - stimulates growth cells - develops mammary glands - starts to deposit fat.
1. more cost effective - 2. powdered milk is in excess production
effects of estrogen
cervix
kidney stones also called ________ ___________ can develop in the sigmoid flexure
24. 114 days
Where livelihood is in agriculture
Sperm survival specs
sow gestation
rectal palpation (BSE)
25. Microscopic - make sure not sterile - very few bulls are actually tested
semen evaluation (BSE)
sigmoid flexure
colostrum
mare's estrous cycle
26. What about the sperm for a bull which has been castrated but still has testicles?
cow gestation
butterfat
Testicles will produce testosterone but not sperm. Bull will attempt to mate - but will be sterile
mare estrus cycle
27. When are steers and heifers weaned from bottle feeding?
6-8 weeks
ewe ovulation
mare ovulation
Culls bulls earlier (2 reasons)
28. (male) pushes the testes outward toward the legs for a cool-down off of the body
~1 month
Jersey Cow
cremaster muscle
Lutinizing Hormone in males
29. Small tubes located at the upper ends of the uterine horns. connects uterine horn to infundibulum. passageway of the egg.
Dairy Cattle Gestation
things to check for in a breeding soundness exam (BSE)
oviducts
Follical Stimulating in males
30. What makes the milk flow through the mammary glands?
normal presentation of the fetus
Parturition
Blood
cryptorchid
31. 26 hours after estrus begins
ewe ovulation
penis sizes vs delivering methods
mare estrus
monorchid
32. Failure to have one testis (gonad) to descend
Sperm growth rate
growth lost from castration methods (knife & band)
stag
monorchid
33. Actual heat cycle (period)
Reasons for gestation length being affected
scrotum
estrus
growth lost from castration methods (knife & band)
34. S-shaped inside body - relaxes to be exposed for breeding. Disadvantges: muscles weaken with age - cannot always hold it in - exposed to harsh outside conditions or stepped on.
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35. Small tubes located at the upper ends of the uterine horns. connects uterine horn to infundibulum. passageway of the egg.
epididymis: definition - 3 parts - 4 functions
oviducts
estrus
1. more cost effective - 2. powdered milk is in excess production
36. Largest dairy cow - largest udder - highly vascular - eat 40-50% dry matter (eat alot) - most total butterfat
reason for seasonal breeding periods
epididymis: definition - 3 parts - 4 functions
ewe estrus cycle
Holstein Cow
37. Produce testosterone. located between the seminiferous tubules
oviducts
Culls bulls earlier (2 reasons)
leydid or interstitial cells
mare's estrous cycle
38. FEED
you want as much sperm as possible to come in contact with the egg before ovulation. the main idea is to have the sperm already in the oviduct when the egg passes through
sigmoid flexure
#1 cost in production
mare gestation
39. Animals which have many estrous periods during certain periods per year (ex: mare - ewe)
seasonally polyestrous
Where livelihood is in agriculture
cow estrus cycle
Jersey Cow
40. 45-60 days after breeding; re-breed as required
dairy cattle pregnancy check
Lutinizing Hormone in males
Mares
cow estrus
41. Parturition is controlled by...
monorchid
Hormones from both the fetus and the mom.
Reasons for gestation length being affected
retractor muscles
42. Larger the cow - more milk is produced; smaller the cow - less milk is produced
Dairy Cattle Gestation
Size of cow in relation to the amount of milk produced
Holstein Cow
cow estrus cycle
43. Provide nourishment for the developing sperm
epididymis: definition - 3 parts - 4 functions
polyestrous
sertoli cells
colostrum
44. Cleans and lubricates the urethra ahead of the sperm. (if not - the urine in the urethra has a high salt content and would cause sperm to rupture and die)
prostate gland
cow estrus
uterus
penis proper
45. (switzerland) 2nd in size and milk production - most muscle -
ewe ovulation
Brown Swiss Cow
elastrator
normal presentation of the fetus
46. Reproduction. more offspring leads to more feed costs - but is offset by reproduction numbers
polyestrous
Where livelihood is in agriculture
castration
estrous
47. % of fat in milk. makes cheeses and ice cream. regulates cost of milk
retractor muscles
testis (gonads)
butterfat
4 major reasons for culling dairy cows
48. Constitute 50-90% of the volume of the ejaculate. (3 glands total: seminal vesicles - prostate gland - cowper's gland)
femininity of a heifer
eminal vesicles
accessory sex glands
Follical Stimulating in females
49. (FSH) causes egg to mature in females
visual evaluation (BSE)
#1 cost in production
Follical Stimulating in females
you want as much sperm as possible to come in contact with the egg before ovulation. the main idea is to have the sperm already in the oviduct when the egg passes through
50. Sperm production
scrotal circumference (BSE)
estrous
Follical Stimulating in males
spermatogenesis